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Procedure 1 - Ambient Temperature below 21 °C (70 °F)

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Variable compressors (if equipped) need to see a thermal load on the system in order to create normal operating pressures.
NOTE: Proper A/C system diagnosis on a vehicle's compressor is dependent on correct refrigerant system charge and tested in ambient temperatures above 21 °C (70 °F). Perform the following steps to achieve normal operating pressures.

  1. 1.

    Drive the vehicle or run the engine until it reaches normal operating temperature.

  1. 2.

    Set the Air Conditioning(A/C) system temperature to the highest possible temperature setting with the dual function disabled (if equipped). Manually set the blower on HI. If the vehicle has a fresh air/recirc button, set it to recirculation. If the vehicle has an A/C switch or compressor on switch, set it to A/C OFF.

  1. 3.

    Close all the vehicle windows and doors.

  1. 4.

    Allow the vehicle to idle for 5 minutes.

  1. 5.

    Confirm the cabin temperature is above 24 °C (75 °F). Set the A/C switch or compressor on switch to MAX A/C ON.

  1. 6.

    Allow the vehicle to idle for 5 minutes.

  1. 7.

    Turn engine off and proceed to procedure 2 - ambient temperature between 21 °C (70 °F) and 38 °C (100 °F).
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